CHEN Erbao East China Institute of Metallurgy
,
Maanshan
,
Anhui Associate Professor
,
Department of Metallurgical Engineering
,
East China Institute of Metallurgy
,
Maanshan
,
Anhui 243002
,
China
金属学报(英文版)
Effect of carbon content of steel substrate,on the chemical vapour deposition(CVD)of TiN has been investigated.The increment of deposition rate is linearly related to the increase of carbon content in own substrate.The α-Fe peak,besides TiN,is revealed in X-ray diffraction pattern of TiN coating.The(220)preferred growth of TiN deposited on steel Cr12MoV substrate increases with the increase of depositing temperature.Only Ti energy spectrum was found from the bright region at coating surface and the interior,while both Ti and Fe energy spectra from dark region.
关键词:
TiN chemical vapour deposition
,
null
B.W. Wang
,
H. Shen
金属学报(英文版)
Ni-Cr System solar selective thin solid films were prepared by d.c. magnetron reactivesputtering under the atmosphere of O2 and N2. Ni-Cr alloy was chosen as targetmaterial and copper sheets as substrate. Using SEM, Spectrophotometer and Talystepto analyze the relations between the selective characteristic and the structure, theformation and the thickness of the thin films. The aim is to obtain good solar selectivethin films with high absorptance and low emittance, which is applied to flat plate solarheat collectors.
关键词:
solar selective thin film
,
null
,
null
,
null
郑龙贵
,
陆建华
,
吕环宇
,
潘超
,
肖业政
,
倪其才
,
朱崇铭
低温物理学报
本文主要介绍了EAST实验中罗柯受电磁干扰的影响,由实验现象推测产生噪声的原因,通过大量的探索过程和模拟测试方法最终将这些干扰有效的抑制和去除,得到最佳解决方案.
关键词:
罗柯
,
电磁干扰
,
测试方法
,
干扰抑制
肖业政
,
陆建华
,
胡燕兰
,
吕环宇
,
倪其才
,
潘超
,
郑龙贵
低温物理学报
EAST作为第一个纵场和极向场磁体都是全超导的装置,如果其超导磁体失超,其储存在磁体内的巨大能量将会转变成热能并造成磁体损坏,因此,可靠的失超检测是装置稳态运行的关键.EAST失超检测主要采用同绕线和二次补偿相结合的失超检测方法,整个失超检测系统分为六个分系统.为了确保整个失超检测系统工作正常,必须提前检查各分系统工作性能.数值模拟仿真系统就是通过实际实验数据与数值模型作为输出信号对各分系统进行性能测试.本文主要介绍了本系统的设计方案和相关结构,并给出相关实验结果分析.
关键词:
EAST装置
,
失超检测
,
模拟测试
LIU Chunpeng XU Yousheng HUA Yixin Kunming Institute of Technology
,
Kunming
,
650093
,
China.
材料科学技术（英文）
In applying the microwave radiation to extractive me- tallurgy,it is essential first of all to find the extent of microwave energy absorbed by various minerals experi- mentally.In this paper,more than 25 kinds of common useful minerals have been individually irradiated by a 500 W,2450 MHz microwave source in an enclosed quartz crucible to ascertain their heating temperature in a definite time.In addition,the reduction and cbloridization tests were also carried out on the titanomagnetite concentrate and pentlandite with microwave heating,respectively. These experiments indicate potential applications of util- izing microwave energy in extractive metallurgy.
关键词:
microwave radiation
,
null
,
null
,
null
李开明
,
李亚洲
,
冯维贵
,
林长
量子电子学报
doi:10.3969/j.issn.1007-5461.2007.05.014
采用非线性反馈控制,用附加了带参数的正弦项对Chen系统进行了有效的控制.随着参数k的逐渐增大,系统的动力学行为呈现出一系列的变化.数值研究结果表明:随控制参数的增大,驱动信号的强度渐大,混沌系统由混沌运动到周期轨道,最终到一相点.
关键词:
混沌
,
Chen系统
,
不动点
,
Lyapunov指数
,
反馈控制
MA Zongyi YAO Zhongkai Harbin Institute of Technology
,
Harbin
,
China
金属学报(英文版)
The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to the anisotropic structure.This seems to be explained by the orientation of whiskers and the densification of dislocations in matrix.TEM observation indicates that the stacking fault is the usual planar defect on the SiC_w surface. composite;;SiC whisker;;Al alloy;;microstructure
关键词:
composite
,
null
,
null
,
null
Z. T. Ma and D. Janke(Institute of Iron and Steel Technology
,
Freiberg University of Mining and Technology
,
Germany)
金属学报(英文版)
Useder certain conditions, nonmctallic inclusions such as oxides, sulfides, nitrides and carbides are no longer harmful to sted service properties. With the new concept of oxide metallurgy, these properties can be improved by generating fine oxide inclusions which serve as heterogeneous nuclei for sulfide and fine ferrite[1-4]. A novel continuous casting (CC) process is expected to be created with the utilization of oxide metallurgy. This is also useful for the forthcoming technologies of direct rolling and near-net-shape casting. The main idea of oxide metallurgy consists of an alternative oxidation technology. It is based on steels treated by complex metals such as Ti, Zr, Ti-Zr alloys and rare earth metals. The selected deoxidants should follow the required conditions which are concluded in this paper.
关键词:
oxide
,
null
,
null
,
null
潘超
,
胡燕兰
,
朱则英
,
吕环宇
,
肖业政
,
陆建华
低温物理学报
本系统对原有超导托卡马克装置EAST的失超保护报警系统进行了升级改造.采用软硬件并行的方式,集中对多路失超保护信号进行监控和保护.系统整体采用CPCI结构,对不同的故障采取不同的故障应对模式,不仅能够对下级系统进行行为控制,而且能直观的显示出故障信号及故障分析,同时在系统内能方便的进行数据存储和查询.
关键词:
失超保护
,
报警系统
